Need help with launching GC backups.

So I softmodded my Wii following the Softmod any Wii guide, I got a copy of a GC game ripped, ran it through DiscEX, made a wad for DML. Then whenever I go to launch it, I get to Audio streaming, then my screen flashes green real quick, and my Wii reboots. Any ideas what's wrong? I've tried Neogamma and Postloader. I've also tried a couple of different games. Wii backups work fine.